PolarStar Concave Spacer (PCS) Officially Licensed SCS High Performance Airsoft Hopup Spacer

"I have this spacer in two of my guns. You have to modify your bucking in order to get the full increase in performance from this spacer (it involves turning the bucking on its side when installing, i'm sure you can find a guide for it online). However, it will still improve your accuracy even with out the bucking modification. This is the best spacer to use with any typical bucking, and especially with the bucking modification. I'm not sure how well it would be with a 2GX bucking, though I'm not sure.

"Will this fit in an ics mo5 hop up
I want to increase my accuracy . This looks like a great hop up nub

My friend has this nub and he got great results from this it's a 5/5 in his opinion

"Very nice nub. Probably one of the best on the airsoft market today because of the cheap innovation it offers. I found that if you super glue the nub in place, it still works, but its more consistent because it can't move (little mod for you gearheads out there). This isn't actually the best nub because despite popular belief, Angel Customs h-hop is probably better for consistency, accuracy, and range all around. Still, such a fantastic product so 6/5.

"This is probably the best upgrade hop-up nub you can get other than the R-hop (which is being phased out due to how easy it is to make one yourself). As demonstrated in the pictures, the nub conforms the hop-up to the shape of the BB and provides more even backspin. Your standard nub is flat and relies on force to conform the hop-up bucking, which is inefficient.

I've built several guns with this nub included, and I always get great results when I combine it with a Madbull 6.03mm barrel and an original Systema hop-up bucking (the black one, not the clear one). Highly recommended for all FPS and ROF builds.

"I cannot tell you how impressed I am with this little nub. It increased my G&G M14's range by 50 feet. I love this piece so much! It truly is the best 7 dollars I have spent on Evke.com. THANKS EVIKE!!!!!!

"I bought this tiny piece of plastic for my WE G39C. Out of the box, even with the hop-up adjusted all the way down, my BB's would take a sharp turn upwards after about 50 feet. I tried heavier BB's, but with no success. I picked this up from evike and I must say this is the best 7 dollars I've spent on any airsoft upgrade.

Pros:
Increased accuracy and range
Only 7 dollars
Easier to install than I was lead to believe

Cons:
May be difficult to install if you're not familiar with hop-ups, or not an enfineering-oriented mind
Tiny! Don't lose it!

I'm very satisfied with this product. Thanks Evike!

"This was the best $7 i've ever spent in my life. the results from this little thing almost made me jizz myself. haha. I don't think it's that difficult to install. This thing doubled my range and my accuracy is dead on now. I have not cronoed my gun yet but it seemed to of incresed the fps maybe a little less than 10 i don't know forsure. i reccomend using 20g and 23g bb's because anything higher you risk breaking your hop up amd faster wear on your bucking.
This is an amazing buy. For $7 you really cant beat it. :)

"great little piece of plastic. lol. it really does improve your hopup and makes your accuracy surprisingly higher. it puts and even spin on the BB and improves grouping immensely. the only thing is that its a pain to install these things. at least on my p90 hopup it is because it keeps wanting to fall out. but its definately worth the time and a few bucks. buy one of these

"i installed this in my echo1 platinum edition m4 mated up with a systema bucking and a matrix tbb. the results have been phenomenal. it was a little tricky to install but if you remove the control arm from the hopup assembly and install it that way, its quite easy. im now getting a 4 inch grouping at 70 feet, even on full auto. buy this product.

"Great little piece gets the job done same as the shredders concave spacer I used this with the combination of a systema hop up bucking, matrix steel tight bore barrel 6.03 510mm went into my agm m16a4 accuracy range went from 135-150 ft to 175-180 ft defy recommended but if you do get this spacer make sure to use a soft type bucking like systema, guarder clear type, or the stock one do not use the firefly bucking with this it will not work btw for best performance team this up a good tight bore barrel as well later

Pros:
Drop in upgrade
Increase's range and accuracy
Increase's fps in some case's

Cons:
Can be some what of a pain to install
well that's really it

P.S
Check out my accuracy test at youtube.com type in agm m16a4 accuracy test
screen name Kingd3001

"Totally awesome. I've been buying Systema hop up buckings and a tight bore barrel with every gun I buy, and I always put them in before I even shoot the gun... I had no idea of the true potential until I got this spacer.

This spacer makes a clear night and day difference in your accuracy. Specifically, you wont see any more flyers.

I'd recommend .23s or heavier with this, as even when your hop up is all they way off, you may still be getting a bit of hop up... maybe too much hop up for .20s depending on your guns setup.

6 bucks well spent.

Buy it.

"Super upgrade!!!! Really low price for such a boost in performance. This with a Systema Hop-up bucking (sold on Evike for an equally low price) gives a really tight grouping. Throw in a tightbore, and you're all set.

Pros:
Low price
Increase accuracy

Cons:
Can be a little difficult to install (check out reviews on YouTube) however, just needs a bit of patience
DON'T LOSE IT!!!!!! (Dropped mine while installing, but I found it)

In conclusion, awesome little upgrade (I mean LITTLE) for a great price. ROCK ON EVIKE!!!!

"I bought a shredder for my KJW m700 after some of the guys at ASF recommended them to me. Someone at a different store had said that it wouldn't fit, but for 6 bucks I figured "why not... it cant hurt to try" so I bought it. After installing, The increased accuracy is amazing. I 1000% recommend!

"what can i say it really works!

pro:
increase accuracy
increase range my jg t3k3 went to 120ft to 200ft with the stock bucking
cheap for upgrade
one solid piece it not made of rubber

con:
none for right now


this is a must have to improve your gun accuracy and range!