APS 13mm Spring - 90 Newton (SRS & TAC-41) SP-DAVI-37 It is specially designed to

It is specially designed to meet the needs of professional and competition shooters because:

If you are looking for the very best in color night vision

Engraved NSN code profile version

the sight can be attached to any long gun or pistol

What sets this system apart from other mechanical systems is its trigger design

APS 13mm Spring - 90 Newton (SRS & TAC-41) SP-DAVI-37 It is specially designed toAPS 13 mm spring, 90 Newtons. This spring follows the APS 13 mm standard (for a spring guide with a 9 mm outer diameter). It fits any rifle compatible with this standard, including all SRS models (except the push bolt mechanism) and all TAC 41 models. When compressed to a length of 99 mm, it delivers 90 Newtons (+ 5%, around 9 kg of force). This spring features a black electrophoresis coating and laser marking for quick identification.