Episode 17 of Bust Your Builds opens with the hosts explaining the format: viewers email in their firearm builds to be aesthetically and functionally critiqued, then scored from 1 to 10. They emphasize the huge submission backlog and encourage more emails, teasing that some of their own guns, including Eliza’s first AR, will be roasted at the end. The first featured rifle channels a late-GWOT/Modern Warfare 2 M4 aesthetic built around a Vltor CASV handguard and matching IMOD stock. The build sheet reveals a Core Rifle Systems Core 15 lower, Criterion Hybrid 12.5" barrel with FSB, Microbest chrome BCG, Otter Creek OCM5 can, Aimpoint PRO in an ADM mount, Scalarworks Peak rear sight, FCD charging handle, 50° ambi safety, Driven Arms Co Shadow Crossover grip, Samson vertical grip, M600 Scout body with Modlite legacy head, SureFire DS00 tailcap, Unity Hot Button, Arson Machine wire guides, and a Flatline Fiber Co padded sling. The hosts praise its tank-like robustness and tasteful parts selection, scoring it 9, 9, and 8.
Continuing from the opener, the hosts finish rating a robust, tank-like rifle built around a Criterion Core barrel and a chunky, monolithic-style upper and handguard. Scores land mostly in the 8–9 range, with comments about its durability and practical configuration. They then joke about a particular stock design notorious for ripping out facial hair, trading stories about painful cheek welds and suggesting a simple tape wrap as a low-effort fix. Attention shifts to a lever-action .410 build that looks straight out of a movie set. It appears to use a Ranger Point Precision handguard and a Mare’s Leg-style Marlin configuration, with an axe-shaped grip, attractive wood furniture, and a compact front-and-rear sight setup originally tied to a UK Rattler contract. The hosts note the very short sight radius and odd cheap Amazon light placement, but love the Terminator, Zombieland, Mad Max, and cowboys-and-aliens vibes. They debate .410 in a lever gun versus .44 or .357 for capacity and effectiveness, ultimately rating it around 6.5–8.5 while emphasizing its cool factor over practicality.
The next segment dives into a heavily modified Polymer80 Glock 34-style pistol that immediately raises eyebrows. It sports a four-chamber compensator, a budget eBay weapon light, a Lone Wolf barrel, and even electrical tape wedged between the frame and slide. The rear iron sight has been removed, and the hosts read a detailed spec sheet listing a Safari holster fit, 50-cent polish job on all contact surfaces, an Overwatch trigger shoe, JG housing with overtravel adjustment, a lightened firing pin, and a very light 10 lb recoil spring. They question whether the home-milled aluminum compensator will let the gun cycle reliably, what ammo weight (like 147-grain) is required, and whether any of the eBay parts are tested. Safety and reliability concerns dominate, and ratings hover around 2–5, with jokes about the owner’s personality and daily carry habits. The focus then shifts to a pink Tavor X95/SAR bullpup with a possible B&T suppressor, Holosun optic on a Scalarworks mount, Olight weapon light, reduced trigger guard, and Geissele trigger. Opinions are mixed on the modified grip and bullpup ergonomics, though the short-barreled setup is acknowledged as functional.
The hosts continue discussing bullpup rifles, highlighting a build that uses a Geissele trigger and is considered one of the better bullpup options compared to the X95 and TAR-21, despite their general dislike for bullpups. They give it ratings around 6–7.5, focusing on ergonomics like a modified cheek or shoulder pad, a trimmed butt pad, and a grip that appears to be a reduced or factory-style IWI unit. The chosen weapon light is an Olight, prompting jokes about the brand’s controversial reputation and the claim that it is the only weapon light company with a confirmed kill, suggesting that simply swapping the light could significantly boost the score. The conversation then moves to a compact AR-15 build featuring a Sons of Liberty Gun Works/Miss Industries 10.5" upper, Bootleg BCG, Stealth “Echron” upper components, Geissele SSA trigger, Wilson Combat/Springco red spring, H3 buffer, Aero large-breach charging handle, Streamlight ProTac, and an Edgar Sherman angled grip. They praise it as a smart, efficient budget build and debate gas system tuning and reliability with the heavy buffer and spring, ultimately rating it around 8–8.5 while speculating about suppressor use and back pressure.
The hosts briefly revisit whether a previously shown AR reliably runs, speculating about spring weight, gas port size, and how a low back pressure suppressor might affect cycling. Trigger options are mentioned in passing. They then evaluate a B&T APC9 PCC outfitted with an SMS Axis visible laser/light combo, an Aimpoint P2 Acro optic, a K2-style grip, and a brace. Ergonomics and control layout are discussed, with some panelists arguing that the SMS Axis should be replaced by a simpler, more robust dedicated weapon light. Attention turns to the translucent magazines, where they debate whether the silver-colored casings are zinc or steel before concluding they are likely Hornady Critical Defense or similar defensive rounds, possibly subsonic. The segment closes by introducing a 6mm ARC AR-15 build based on Noveske components but using a Faxon 22 ARC barrel, a HuxWrx 5.56 Flow suppressor, B5 stock, Geissele SSA trigger and lower parts, and a JP H2 Silent Captured Spring. The full parts list is read in an exaggerated British accent, adding humor while still conveying the builder’s detailed component choices.
The discussion deepens around a rifle that started life as a Noveske 6mm ARC and was rebarreled to 22 ARC while retaining a 6 ARC BCG. The hosts talk through case diameter, its 6.5 Grendel parent case, and how that affects compatibility with the HuxWrx Flow 5.56 suppressor. The builder has added a Fat Boy Elevate with an Invert 60 head, an Arca rail, tripod interface, and a thermal optic on a Warren QD mount, plus a suppressor cover showing heavy use. They explain that 22 ARC offers more case capacity for powder, promising very high velocities and a recoil impulse similar to other small, fast projectiles, though some hosts admit they have not personally shot it yet. They debate whether a dedicated thermal is preferable to an LPVO with a clip-on thermal for this role and criticize a steep, “kung fu” style grip. Later in the segment, they analyze another rifle sporting a large Precision Armament-style muzzle brake, speculating that it likely produces near-zero recoil but massive blast. The brake’s proximity to a weapon light that shows little carbon residue suggests limited live-fire use, prompting questions about real-world testing.
The hosts focus on the rifle with the oversized muzzle brake mounted extremely close to a weapon light. They speculate that the brake’s gas-channeling design might make this proximity survivable for the light, but still express concern about blast, heat, and carbon buildup. The pressure pad placement is examined to infer whether the shooter is left- or right-handed, noting that the location forces more deliberate activation rather than accidental presses. The optic configuration features a 3–9x variable scope with a 1x red dot mounted on top, which they praise as a versatile setup. By counting M-LOK slots, they estimate the barrel length around 16–17 inches and compliment the FN wedge-lock handguard for its rigidity and solid lockup. Ratings mostly fall between 7 and 9, framing the rifle as a capable general-purpose setup. They critique the aggressive muzzle brake for class use due to noise and concussion, question some grip and buttstock choices, and discuss heat management on the handguard. One host notes they would leave most of the build unchanged, aside from reconsidering the brake.
A viewer-submitted PCC becomes the focus, earning generally positive reactions. The gun uses Mac-style magazines with bolt hold-open capability, and the hosts clarify that while these mags work in this platform, they likely will not provide bolt hold-open in MP5s, though standard MP5 mags remain compatible with the featured gun. The build includes a Geissele trigger, upgraded pistol grip, quality sling, and a solid brace or stock setup that suits a compact, backpackable role. They identify the optic as a newer Trijicon MRO variant, possibly the HD or SD, and explain that the manufacturer has slightly revised their lower receivers over time, making trigger swaps like the Geissele easier in newer versions. Suppressor mounting is debated: the PCC runs a HuxWrx Flow 9K, and the panel splits between preferring tri-lug for quick on/off versus direct thread for security and repeatability. They suggest relocating the sling attachment to the A3 Industries stock’s M-LOK slots for better ergonomics and control. Overall, they view it as a reliable blowback-operated setup and rate it around 7–9 out of 10.
The next build features a Colt pre-ban upper mated to an Aero lower, prompting a discussion about how pre-ban lowers are generally more desirable than uppers for legal and collector reasons. The hosts explain that many restrictions, including compatibility with FRTs or full-auto configurations, are lower-specific, and they mention the existence of semi-auto-only BCGs. They criticize the choice of a CMMG safety selector, joking about its sharp edges, potential to cut fingers, and less positive engagement compared to options from Radian or Badger Ordnance. A technical explanation follows on how gas in a direct impingement AR accumulates in the upper receiver and vents through the charging handle area toward the shooter’s face, questioning the logic of “Swiss cheesing” the upper’s roof as a supposed fix for gas-to-face issues. The rifle itself is characterized as a fairly standard GPR/SPR-style build, with components like a CMMG barrel, Daniel Defense BCG, TriggerTech trigger, JP Silent Captured Spring, B5 furniture, Seekins low-profile adjustable gas block, Dead Air flash hider and can, a BCM stubby grip, Burris PEPR mount, and a Vortex Viper PST with a 45-degree offset optic. One host dislikes the dimpled Midwest Industries rail, and the rifle earns a typical 6.5–7 rating.
The segment opens with final ratings around 5.5–6.5 for a rifle where the main critique centers on the 45-degree offset optic placement, questioning whether it should be mounted closer to the primary optic rather than out on the rail. The hosts wrap up the viewer submissions, noting that this batch lacked any truly standout “banger” builds but recalling memorable past entries like a G36-style rail-on-rail monstrosity and a Bruce Lee-themed rifle. Focus then shifts to an in-house gun: Eliza’s first AR, a braced AR-15 pistol. It features an SBA5 brace, Griffin Armament 115 Dual-Lok suppressor, Driven Arms Co C Shadow Crossover grip, ambi controls, and a Sig Romeo 4T optic on a knockoff Scalarworks-style riser she plans to replace with a Unity riser. A Wilder Tactical sling and Magpul Picatinny adapter handle carry duties. The build also includes a Sig Foxtrot MSR light, Griffin Armament grip panels, and carefully managed cabling and light placement to minimize suppressor shadow. They shout out Weapons Works magazines from Blue and compare various charging handles like the Snatch, Geissele, Aero Breach, and a SilencerCo model while commenting on panel texture and aesthetics.
Eliza explains that her AR-15 pistol centers on a Griffin MK2 11.5" upper with ambidextrous controls, shaped heavily by time spent at the range trying different components. Other projects, including a Wilson Combat lower, are still in progress. The group debates whether to eventually convert the pistol to an SBR, weighing the benefits of a stock against the convenience of traveling with the current SBA5 brace and the perceived hassle of the SBR registration process. They highlight the Sig Romeo red dot, comparing it favorably to an Aimpoint T2 in terms of performance and value. The Sig Foxtrot weapon light receives strong praise for output, included tape switch, cable management options, and price advantage over alternatives like the Streamlight Pro series. Ergonomics are fine-tuned on-air: they decide to keep the light position despite some suppressor shadow, suggest a thinner safety lever on the shooting side for comfort, note the presence of a polished mil-spec trigger, recommend staggering rail covers for better grip, and mention a preference for folding stocks or braces on M4-style builds.
The hosts assign numerical ratings to Eliza’s AR pistol, landing in the strong 8.5–9 out of 10 range. They revisit the brace versus SBR discussion, noting that the SBA5 is currently their preferred brace option for stability and comfort, even as they acknowledge the advantages of a registered SBR. The rifle is described as night-vision capable thanks to the Romeo optic, but intentionally lacks a laser until the owner gains more experience and training on proper laser employment. Sling setup is examined in detail, with a preference expressed for using a 1913 Picatinny rail mount at the rear instead of an M-LOK slot to reduce snagging and increase mounting flexibility. They then talk through tuning the rifle with a Griffin adjustable gas block, something they initially did not realize Griffin offered. The process involved adjusting gas one round at a time to find the optimal setting for reliability and recoil control. As the episode winds down, they encourage more viewer submissions and specifically request shooting video and grain-weight details from the owner of the earlier four-chamber compensator pistol to verify its function.
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