This is the second ultimate sir nozzle I have purchased, the first was for my G&G ARP556, along with all the mods I had done I achieved a perfect air seal, the second was for my son’s evolution M4 and again although his components were not quite as high quality as my ARP this nozzle helped me gain great results, the fit and finish of the nozzle is literally perfect and having the internal O ring is essential to achieve the perfect air seal, along with this nozzle a quality cylinder head, piston and correctly fitting piston o ring using a little silicone grease will give you a big consistency and performance boost, don’t forget a little silicone grease smeared on the piston head that the nozzle slides onto A 5 star product 👍
Verified purchase: Yes | Condition: New
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