The M4-style rifle as only DPMS can render it. Beginning with the 14.5-inch M4-contour barrel with chrome-lined bore and chamber, the DPMS AP4 carbine shares all of the same features ...

Sporting a .750 diameter barrel opening, this front sight will fit standard heavy barreled rifles (5.56x45mm), AP4 Carbine models as well as the LR-308T - the 16 inch heavy barreled 308 caliber ...