Midwest Industries Ruger PC9 12" M-LOK Handguard MI-CRPC9

Please note additional installation instructions from the manufacturer:

We have found during dozens of installations that there are variations in the Ruger® firearms. These variations will in no way effect the function or performance of the Ruger®PC9™ carbine. Please remember this firearm is a takedown model so perfect alignment may not always be achieved. We have found for best alignment, start by aligning the MI handguard with the top edges of the factory plastic stock. This may take a few attempts and some patience but will produce a very satisfactory result. We have also noticed some variations in the rear sights of these rifles. They are sometimes not installed perfectly straight to the bore. This can be corrected by removing the peep sight portion and straightening out the base. Some rifles will also show a left or right cant with the whole barrel assembly when locked into place. You can see this by looking from the rear of the gun and using the top rail as a reference surface. Neither the function of our handguard or the guns performance will be effected by these slight alignment variations of the factory manufactured firearms. On a final note if after installing the handguard on your firearms you still have any play please check that the tension adjustment ring is properly adjusted on your rifle. Additional information and photos can be found on our website.