YHM Turbo K-RB Integral Suppressed Upper

YHM TURBO K-RB INTEGRAL SUPPRESSED UPPER RECEIVER GROUP - 5.56 AR-15 SUPPRESSOR UPPER, 11.5" BARREL

The YHM Turbo K-RB Integral Suppressed Upper is a 5.56mm AR-15 upper built around an integral Turbo K-RB suppressor that is pinned and welded to an 11.5" barrel, giving a combined barrel and suppressor length of just over 16". The barrel and suppressor assembly is made from 17-4 PH stainless steel and Cobalt 6, and the upper is full-auto rated. It comes assembled with an MR7 M-LOK handguard, a mil-spec A3 flat top upper receiver that is optic ready, a low-profile suppressor gas block, and a black plated gas tube.

Because the integral Turbo K-RB suppressor is permanently attached and the combined length is over 16", the entire upper registers as a single NFA suppressor. It transfers on one form, and no SBR registration is needed for the lower it runs on. The trade-off is that the suppressor can't be removed or moved to another host. Shooters who want a can they can swap between rifles can look at the standalone Turbo K-RB suppressor instead.

This upper was designed specifically to take on blowback. Its gas block reduces blowback and cyclic rates, and the overall design prioritizes reduced backpressure and cleaner cycling over maximum sound reduction. That makes the Turbo K-RB Integral Suppressed Upper Receiver Group a strong fit for shooters who run higher round counts and want a more comfortable suppressed 5.56 experience.

The upper fits any mil-spec AR-15 lower receiver. It ships without a bolt carrier group or charging handle, so plan on adding a mil-spec 5.56 bolt carrier group and a standard AR-15 charging handle to complete the build.

CAPITOL ARMORY'S OPINION

For anyone who wants a dedicated suppressed AR-15 without juggling two NFA items, this upper keeps things simple. You get a short, suppressed 5.56 setup on one form, and your lower stays a standard lower. Drop it onto any mil-spec AR-15 lower you already own, add a bolt carrier group and charging handle, and you're ready to go. The optic-ready flat top and M-LOK handguard give you room for your preferred optic, light, and other accessories without hunting down extra parts.

The focus on reduced blowback and cleaner cycling makes it a good match for training days and long range sessions where you're putting a lot of rounds downrange. A full-auto rating and 17-4 PH stainless steel and Cobalt 6 construction tell you this upper was built with hard use in mind, so it makes sense as a go-to suppressed rifle rather than something you only take out once in a while.

The one thing to be sure of is that you're comfortable with the suppressor being permanently part of the upper. If you'd rather have a can you can move between rifles, the standalone Turbo K-RB suppressor gives you the same backpressure-focused approach in a silencer you can mount on other 5.56 hosts. If you want one rifle that's always suppressed and ready, this upper is the cleaner way to get there.

FEATURES

• Length: just over 16" combined barrel and suppressor (11.5" barrel)
• Mount: Integral, pinned and welded to the barrel
• Caliber rating: 5.56mm
• Full-auto rated
• Color: Black
• Material: 17-4 PH stainless steel and Cobalt 6
• Integral Turbo K-RB suppressor
• Low-profile suppressor gas block designed to reduce blowback and cyclic rates
• MR7 M-LOK handguard
• Mil-spec A3 flat top upper receiver, optic ready
• Registers as a single NFA suppressor, with no SBR registration required for the lower
• Model: YHM-8025

WHAT'S INCLUDED

• Integral Turbo K suppressor assembly, pinned and welded to an 11.5" barrel
• MR7 M-LOK handguard
• Flat top A3 upper receiver assembly
• Low-profile suppressor gas block
• Black plated gas tube

COMPATIBILITY

• Lower Receivers: Any mil-spec AR-15 lower receiver
• Required, Not Included: Mil-spec 5.56 bolt carrier group, standard AR-15 charging handle

MEDIA

• Turbo K-RB Integral Suppressed Upper Receiver Group Spec Sheet

SOUND PERFORMANCE

• 5.56mm: 140 dB (YHM)