Pistol and SBR Uppers

M-4 11.5" (16 OAL) XM-177 5.56 1/7 CL Triangle

11.5 Upper A4 1/7 CL Barrel We started with a 11.5" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with Chrome Lining to the bore, and chamber. The upper receiver is T marked and is type 3 hard coat black. This does...

M-4 11.5" (16 OAL) XM-177 5.56 1/7 QPQ Triangle

11.5 Upper A4 1/7 QPQ Barrel We started with a 11.5" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with QPQ to the bore, and chamber. The upper receiver is T marked and is type 3 hard coat black. This does have M4...

M-4 11.5" 5.56 1/7 QPQ with MI Drop In Quad Rail

11.5 MK-18 Upper A4 1/7 QPQ MI Quadrail We started with a 5.56 11.5" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with QPQ finish. The upper receiver is T marked and is type 3 hard coat black. This does have M4...

M-4 10.5" 5.56 1/7 QPQ with MI Drop In Quad Rail

TNTE MK-18 QPQ MI UpperThis upper has a 10.5" Gov profile barrel with a 1/7 RH military twist rate.  The button rifled barrel is 4150 chrome-moly steel with a QPQ finish. We are using 7075-T6 forged M4 feed ramped uppers. It's only...

MK-18 QPQ 10.5 pistol upper 1/7 Enhanced Troy Rail

This is a custom-built pistol upper built in our shop. This is a pistol and SBR use only and all NFA rules apply. This upper does not include a BCG or charging handle.  Specs include:  TNTE 10.5" 1/7 twist 4150 5.56 chambered barrel...

MK-18 QPQ 11.5 pistol upper 1/7 Enhanced Troy Rail

11.5 MK-18 Upper A4 1/7 QPQ Troy Quadrail We started with a TNTE M4 5.56 11.5" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with QPQ Nitride treatment to the exterior, bore, and chamber. The upper receiver is T...

M-4 10.5" 5.56 1/7 CL with MI Drop In Quad Rail

10.5 MK-18 Upper A4 1/7 Chrome Lined MI Quadrail We started with a 5.56 10.5" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with a phosphate finish and chrome lining. The upper receiver is T marked and is type 3...

M-4 10.3" 5.56 1/7 CL with MI Drop In Quad Rail

10.5 MK-18 Upper A4 1/7 Chrome Lined MI Quadrail We started with a 5.56 10.3" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with a phosphate finish and chrome lining. The upper receiver is T marked and is type 3...

300 Blackout 10.5" 1/7 QPQ Pistol Upper

10.5 MK-18 Upper A4 1/7 QPQ  We start with a 300 blackout 10.5" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with QPQ finish. The upper receiver is T marked and is type 3 hard coat black. This does have M4...

M-4A1 10.5" 5.56 1/7 CL with MI Drop In Quad Rail

10.5 MK-18 Upper M4A1 1/7 Chrome Lined MI Quadrail We started with a 5.56 10.5" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with a phosphate finish and chrome lining. The upper receiver is T marked and is type 3...

300 Blackout 11.5" 1/7 QPQ Pistol Upper

11.5 MK-18 Upper A4 1/7 QPQ  We start with a 300 blackout 11.5" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with QPQ finish. The upper receiver is T marked and is type 3 hard coat black. This does have M4...

300 Blackout 12.5" 1/7 QPQ Pistol Upper

12.5 MK-18 Upper A4 1/7 QPQ  We start with a 300 blackout 12.5" 1/7 twist barrel for this build. The barrel is made from 4150 machine gun steel with QPQ finish. The upper receiver is T marked and is type 3 hard coat black. This does have M4...