The Cross Machine Tool UHP10 Lower Receiver coupled with the UPUR10 Upper Receiver is the perfect foundation to start your .308 semi Automatic Precision Rifle build. Compatible with the widest variety of standard LR308 components & handguards UHP-10 LOWER CNC MACHINED FROM 7075 T6 BILLET UPUR-10 UPPER PRECISION MACHINED FROM 7075 T6 BILLET TYPE III CLASS II ANODIZED MAG-WELL PROFILE IN LOWER- ACCEPTS PMAGS .154" DIAMETER TRIGGER & HAMMER PIN HOLES IN LOWER UPPER TENSIONING SCREW IN LOWER INTEGRALLY MACHINED TRIGGER GUARD ULTRA FLARED MAGWELL ON LOWER BOLT CATCH ASSEMBLY SCREW (No Roll Pin to install) TAKE DOWN PIN DETENT SPRING RETENTION SCREW INCLUDED USES STANDARD DPMS TYPE .308 LOWER PARTS KITS / BCG/ DUSTCOVER UPPER RECEIVER IS COMPATIBLE WITH A WIDE VARIETY OF 308 HANDGUARDS LIFETIME WARRANTY AGAINST MANUFACTURE DEFECTs