Precision CNC machined to exact Mil. Std. 1913 specification rail dimensions from a single billet of steel. They match the receiver contour, ensuring straight and true alignment. Available Nightforce X-Treme Duty Steel Bases for Rem 700MPNFitsElevation AdjustmentPieceA112Rem 700 LA20 MOA1A115Rem 700 SA20 MOA1A111Rem 700 LA20 MOA2A114Rem 700 SA20 MOA2A113Rem 700 LA40 MOA1A116Rem 700 SA40 MOA1Available Nightforce X-Treme Duty 1-Piece Steel Bases for HS 700MPNFitsElevation AdjustmentA135HS 700 LA20 MOA (8-40 Screws)A139HS 700 LA40 MOA (8-40 Screws)A146HS 700 SA20 MOA (8-40 Screws)Available Nightforce X-Treme Duty 1-Piece Steel Bases for SavageMPNFitsElevation AdjustmentA165Sav LA New Style20 MOA (6-48 screws)A230Sav LA New Style20 MOA (8-40 screws)A168Sav SA New Style20 MOA (6-48 screws)Available Nightforce X-Treme Duty 1-Piece Steel Bases for Win 70MPNFitsElevation AdjustmentA196Win 70 LA20 MOA Nightforce 1 Piece Savage LA 20 MOA Base A230