Tunable recoil assembly

Abstract

In some embodiments, a tunable recoil assembly is provided. The tunable recoil assembly may include a guide rod having a front end, a length, and a rear end; one or more springs around the length of the guide rod; and a removable cap releasably coupled to one of the ends of the guide rod. In some embodiments, the removable cap may be retained using a spring force, and may be slidingly coupled, twistingly coupled, or otherwise releasably coupled to the one of the ends of the guide rod.

1 . An apparatus, comprising:
 a kit of parts, including:
 a set of recoil springs, including a first recoil spring having a spring weight associated with firing with a gas compensation device and a second recoil spring having a different spring weight associated with firing without the gas compensation device; 
 a guide rod having a front end, a length to receive any recoil spring from the set of recoil spring, and a rear end; and 
 a removable cap releasably couplable to one of the ends of the guide rod using a spring force; 
 the removable cap: 
 1) slidingly removable along an axis that is different than a center axis of the guide rod, or 
 2) twistingly removable, in which the at least one spring retains the removable cap on the guide rod in a fixed rotational position. 
   
     
     
         2 . The apparatus of  claim 1 , further comprising a firearm usable with the gas compensation device, wherein the guide rod and at least one recoil spring from the set of recoil springs are installed in the firearm. 
     
     
         3 . The apparatus of  claim 1 , further comprising:
 a through hole to receive a retention stud; and   a cap retention stud spring to urge the retention stud into the through hole.   
     
     
         4 . The apparatus of  claim 1 , wherein:
 the removable cap is retained by an end of the recoil spring from the set, or   the recoil spring from the set comprises an outer spring installable around an inner spring around the length of the guide rod, and wherein the removable tail cap is retained by a back end of the inner spring.   
     
     
         5 . An apparatus, comprising:
 a kit of parts, including:
 a set of recoil springs, including a first recoil spring having a spring weight associated with firing with a gas compensation device and a second recoil spring having a different spring weight associated with firing without the gas compensation device; 
 a guide rod having a front end, a length to receive any recoil spring from the set of recoil spring, and a rear end; 
 a removable cap releasably couplable to one of the ends of the guide rod using a spring force; and 
 means for engaging opposing positions on an end of the recoil spring to retain the recoil spring in a partially collapsed state for separating the removable cap from the guide rod. 
   
     
     
         6 . The apparatus of  claim 5 , the removable cap slidingly removable along an axis that is different than a center axis of the guide rod. 
     
     
         7 . The apparatus of  claim 5 , the removable cap twistingly removable, in which the at least one spring retains the removable cap on the guide rod in a fixed rotational position. 
     
     
         8 . The apparatus of  claim 5 , further comprising:
 a head integrally formed with the other one of the ends, or   an additional cap releasably or fixably attached to the other one of the ends.   
     
     
         9 . The apparatus of  claim 5 , wherein the at least one spring comprises a spring of the one or more springs. 
     
     
         10 . The apparatus of  claim 5 , further comprising a retaining bushing around the guide rod in front of the one or more springs, wherein the retaining bushing is arranged to engage a slide lug of a slide of a firearm to collapse at least one of the one or more springs when the slide is in a locked position. 
     
     
         11 . The apparatus of  claim 5 , further comprising an additional removable cap coupled to the other one of the ends of the guide rod. 
     
     
         12 . The apparatus of  claim 11 , wherein the one or more springs comprise an inner spring around the length of the guide rod and an outer spring around the inner spring, the outer spring being retained by the removable cap, the additional removable cap retained by a back end of the inner spring.