I built this upper a few years ago, and I just don't use it. Fired about 300 rounds total. 4.5" barrel with a 9" handguard allowed my suppressor to just stick out of the front of the handguard, giving an "SD" look to the upper. Internal diameter of rail is just over 1.5", so most 9mm pistol suppressors will fit inside the rail. Upper ran great with a with a normal H1 and carbine buffer spring; no changes needed when swapping a 5.56mm upper to this 9mm upper. Ran well with standard 115gr and 147gr sub sonic loads.

NFA or pistol lower use only. Complete upper only.

- M4 upper, no forward assist (with standard charging handle and ejection port cover)
- Fox Trot Mike FM9 BCG
- 4.5" barrel, with 3-lug muzzle device
- 9" Troy M-Lok handguard w/ cover
- 2x Mean Arms ENDO magazines (Gen2 PMAG bodies), 30 rounds (these allow this upper to be used with a standard AR15 lower, no modifications or magwell adapters needed)

$400. Cash only, no trades. If you are reading this, it is available.

Meet at Bass Pro in Mesa (or around Tempe/Mesa area)