I built up a .310 upper receiver a few months ago! and I’m going to use it for this coming Deer Season!
Olympic Arms Inc. Model: K30R16
Upper Type: OAI Forged A3 Flat Top w/ Picatinny Rails.
Front Sight: OAI Gas Block w/ Picatinny Rails.
Handguard: OAI F.I.R.S.H.® Free Floating w/ Picatinny Rails.
Barrel: 16in. Bull, 416 Stainless Steel, Button Rifled.
Chambering: .310 / 7.62x39mm
Bore: Long-Life, non-Chromed Bore.
Twist Rate: 1:10
Muzzle: Crown.
Forward BUIS: YHM® PN #9584
Rear BUIS: YHM® PN #9680
Rail Cover: Magpul® XTM™ … FDE
Rail Cover: Magpul® Ladder Rail Protectors … FDE
Lower Receiver: Aero Precision® w/ Surplus Ammo & Arms® ‘Roll-Mark’
LPK: DPMS®
Trigger Guard: Magpul® M.O.E.® ... FDE
Buttstock: Magpul® M.O.E.® W/ Mil-Spec Buffer Tube … FDE.
Buttstock Pad: Magpul® Enhanced™
Grip: Magpul® M.O.E.® … FDE.
Optics: Millett® Zoom-Dot™
Mount: LaRue®
Magazine: C/Products® 10-Round ‘SS’ 7.62x39mm … Finished w/ Krylon® ‘Ultra-Flat’ w/ Fusion Technology™
I’ve been using the HSM® factory ammo, and this Yugoslavian® Mil-Surp as well.
I also have the OA® .300-OSSM GameStalker™ upper receiver; and I’ve been out Bear hunting with it.
Olympic Arms® GameStalker UR-300
Upper Type: A3 Type Forged Fat Top w/ Picatinny Rails
Front Sight: NA
Handguard: Light-Weight Free Floating Aluminum Tube w/ Knurling
Barrel: 22” 416 Stainless Steel (Fluted Under Handguard)
Chambering: .300 OSSM
Bore: Long-Life non-Chromed Bore
Twist Rate: 1:12
Muzzle: Crowned
Left to Right >>> 243WSSM – 25WSSM – 300-OSSM