pmr with cp 2 piece barrel system, cp on/off, cp, back cap, ndz feedneck, stock halo
Made of metal, and it does vent more noticeably than stock.
Heaver than stock
Its just a back cap so that leaves little room for positive and negative feedback but i'll try to give a good review.
I've had this product for a few months now. I needed it because I did the inevitable and stripped the stock one. It is heavier than the stock back cap if you were to hold one in each hand, but its way more durable. You won't feel it once its on the gun. I havent had any problems out of it except for one time when i noticed it was slowly coming unscrewed. A lot of pmr owners have reported this incident with different brands of back caps so its not just limited to this one. I havent done this but it would just make sense to put a little teflon tape on the grooves of the cap to fix this problem.
I have noticed that it does vent more air than stock, but I really havent noticed an increase in my bps. It could be there, but the pmr is so fast in the first place how could anyone really tell? If you're worrying about it making the gun less efficient with all the air it vents, you didnt really buy an air efficient gun to begin with. Besides, most fields have all day air so it shouldnt be something to worry about.
Overall, i am completely satisfied with this product. I mainly bought it as a durable replacement for the stock cap that got stripped. It does vent more noticeably than stock (like havin a fan in front of your face. Ah, feels great in the summer time haha) so i guess its possible that it increases my rof a little without my notice. Great product, great company. If you're thinking about this product, think no more. buy it!