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RA-Tech Aluminum Nozzle w/ NPAS Valve for WE SCAR Airsoft GBB Rifles

ID: 45236 (RAG-WE-122)
RA-Tech/Maple Leaf (AST)45236
4.3 stars, based on 3 reviews
RA-Tech Aluminum Nozzle w/ NPAS Valve for WE SCAR Airsoft GBB Rifles
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  • CNC milled aluminum nozzle
  • Pre-installed NPAS valve
  • Nozzle comes completely assembled
  • NPAS adjustment tool included
Compatibility: For WE-Tech SCAR Series Airsoft GBB Rifles
Material: CNC Milled Aluminum
Package Includes: Nozzle w/ NPAS, NPAS Tool,

Manufacturer: RA-Tech

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3 Customer Reviews

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by Marc S. on 05/07/2018
"Without a doubt if you own a WE SCAR you need this part. The original plastic nozzle is prone to breaking over time due to the heavy bolt carrier slamming it into the hopup chamber and the stock gun is 400FPS+ which is far too hot for most fields. With the NPAS you can dial the speed from the original all the way down to

I have owned this part for several months now and while I would like to give a better score I cannot. The price is high but that isn't why I'm giving it a relatively low score. The expense is undoubtedly the bolt being made out of aluminum as it is a very complex part to produce. While a regular plastic nozzle could be modified at home with a homemade NPAS for a few dollars, the plastic will likely break eventually. If you are really inclined, you actually could cast and machine a metal nozzle using a zinc/aluminum alloy using the original nozzle for specs, but that is far too much work even for me unless I am making like 5 of these at a time. It is easier for me to pay the money for this nozzle.

The sole reason I am giving a low score is because this part ships LIKE it was a low priced product, or something sold widely. There are absolutely no instructions to its use or installation (the latter can be found on youtube) which made this product a time intensive learning curve for me that didn't have to happen if RA-Tech didn't cut that small but vital corner.

The first thing that should be noted is that when you install this bolt and put the side and top nozzle rail guides, you must locktite the screws and the edges of the guides to the bolt carrier. Unlike the original plastic guides which compress slightly and put some outward tension on the threads locking them in place, the die cast metal guides do not flex at all, making them work out of the bolt carrier in short order. Specifically, the top guide has the most frequent chance of backing out and it can cause the screws to be lost and can jam up the reciprocation of the bolt.

As far as the NPAS function, RA tech does not apply any locktite to the threads at all. What this means is that you can set the nozzle to your desired speed but in just 2 magazines worth of firing the nozzle will work its way down to such a low velocity that BB wont be able to exit the barrel and will jam up one on top of each other. It will be deceptive as to the issue as due to the way the NPAS works, even if it isn't giving enough gas to fire a BB, the bolt carrier will still cycle as hard as if you were shooting at peak velocity. The solution requires that before you install your bolt (or right now if you own one and haven't done this yet) is to find a very small grub screw in the side of the nozzle towards the rear, Undo that grub screw and then ideally firmly clamp the rear in a vise (although vise grips may work) and with pliers grip the top side of the nozzle and twist counter clockwise to screw the base off. You want to be careful in this step because you obviously do not want to break the ribbings on your expensive nozzle, so the placement of where your pliers grip is key. With the base screwed off, you will see the floating key that mates with your NPAS adjustment tool. This key mates with a pronged screw and this screws threads should be degreased and coated in green locktite (allows free adjustment but keeps the threads from drifting from whatever position you want, specifically designed for these kinds of applications). Green locktite is $5 at lowes for a small tube. It may seem expensive but you will only use a little and that small bottle goes a long way. If you are really cheap you can use nail polish (found at dollar store) as a poormans locktite. Just make sure not to put too much and immediately after reinstalling work the threads all the way up and down to make sure it is spread on thin, and do so about every 10-20 min for about an hour to ensure it doesn't set too hard and freeze the screw in place. You are just trying to add friction to the threads to keep them from drifting.

As far as the NPAS itself, it has a range of 5 rotations. Turn adjustment counter clockwise to lower velocity. You get approximately 30FPS adjustment every half a turn, but it isn't proportional throughout the adjustment. All the way open is around 400FPS. 4 revolutions from the lowest setting is about 390FPS (the velocity you want to stay under a 400FPS velocity limit). 2.5 revolutions from lowest setting is 350FPS, and 2 revolutions is 220FPS. Any setting 1.5 turns or lower will not allow enough gas to be fired to propel a BB to reliably clear the barrel.

Overall, this part is worth the money and if you have a SCAR GBBR you should buy this even if you don't think you need it... because you do. This part only exists because WE cut a corner on a vital component of their gun. Yes their other guns don't need an aluminum nozzle, but then again their other guns don't have a 1LB bolt carrier crushing the nozzle on every shot. Copy and paste this review and save it for reference when you use this nozzle and you should be all set for a much better experience than I did.
by Stanley T. on 11/21/2016
"Like the guy said above or below, this product is a must for anyone who want to use propane (not the green gas can). I used propane on the gun in normal room temperature, and the nozzle broke by itself after a few burst fire.

For the Aluminum Nozzle, I didn't use solid grease like the guy did before me, but I used high concentrated silicone oil to lube around the nozzle. One thing you really have to be careful is the ring on the spring that hooks on the carrier, because it bends very easily.
by Chris V. on 03/15/2015
"A critical piece that will add to the longevity of the system. I replaced my open bolt with this aluminum nozzle because it is less prone to breaking, cracking, etc. The NPAS is also a great touch, because i was able to fine tune my fps to meet the limit. Just make sure to slather one lots of SOLID grease, and not just standard silicone oil from a can or so. The gas from the system will blow it all out, so this is the best way to keep it lubed.

Overall, it's a good piece, but installing it can be tricky. If you're not careful, you can easily mess up the ring on the return spring when reinstalling the pin to hold it in place on the bolt. Though, that's just a design flaw on WE, I believe.

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