Supplement your barrel length options or kick off a new build with the bufferless 7.62x39mm DISSENT upper group with the 12.5" barrel. Built off the mid-size Mk47 platform, this DISSENT upper requires no buffer tube. DISSENT upper groups include a picatinny rear end plate for your existing Mk47 lower. A forward non-reciprocating charging handle allows for quick and easy manipulation without coming off target and the M-LOK handguard with top picatinny rail provides ample mounting space for whatever accessories you please. FeaturesAdjustable Gas Block: If you're looking to shoot suppressed or just fine tune your DISSENT to your preferred ammo, the adjustable gas block gives you the freedom to dial in the gas system exactly to your liking. Never too much and never too little.Gen 1 Mk47 Compatibility: DISSENT Mk47 upper groups are compatible with Gen 1 Mk47 lowers (no bolt catch) and Gen 2 Mk47 lower receviers (with bolt catch). Mk47 Uppers will NOT fit on AR15 lower receivers.