I have 8 PSA M4 profile uppers
Barrel length 16"
HP/MP tested
5.56 Nato Chamber
Chrome-lined bore and chamber
1 in 7" twist
Special Heavy profile barrel
.750" gas block diameter
M4 feedramps
Forged upper
T-marks
Full auto bolt carrier
Carpenter 158 Bolt
The complete rifle includes a complete PSA lower and PSA build kit
Shipping is available for $15