Airsoft GI small logo

(Discontinued) PolarStar Concave Hop Up Spacer

[M07G09][06446 / Model-PCS]
Orders over $149 qualify for free shipping
Free Shipping for orders over $149 No Coupon needed

Replace your original hop up spacer with this Polar Star Concave Hop Up Spacer. The concave shape hop up spacer is designed to provide 2 points of contact on the top of the BB to provide a more uniform backspin on the BB to provide the straightest possible BB flight.

Manufacturer: PolarStar
Color: Black
Material: Plastic
Package Includes: One (1) Spacer
see 2 reviews | Write a Review
verified buyer
W. WELDON | 2010-06-02
Product Information:
Concave hop up spacer/nub. The concave shape is the same contour as a BB this allows the nub to protrude through the barrel window with a concave shape that will fit perfectly over your BB. This design will make left or right spin unlikely because the nub should center the BB and only apply back spin. A copy of the SCS nub from Shredder (E.D.G.I.) Seems to work pretty good for me so far with a systema bucking and a tight bore.

1. No left or right spin should be possible if set up correctly (see shredders webpage)
2. Should allow for high accuracy a fine adjustability

1. Make sure your hop up (where the strike chamber pushes the nub through and into the barrel) and your barrel window (rectangular hole in your barrel) are rectangular (not rounded) and will allow the nub to fit through. Test this before you put everything together. This may require some fine filing. (see shredders webpage if you need help) Not realy a con just make sure when buying those parts or get a precision file set.
I'll give it 5 stars
verified buyer
E. EDICA | 2010-06-27
Product Information:
i bought this Item on the terms that its pretty much a SCS nub and it is. I mainly purchased it for a test in my JG BAR10 and with the hopup arm mod for the nub i have to say that my bar10 at 300' im able to hit a telephone pole so a man sized target is easy. My bar10 is shooting 575 w/ .2s but of course i use .3s for penetration and stable bb flight. I highly recommend this nub for anyone looking to try a build or wanting to "test" the waters on something other than your ordinary nub.

On a side note: I wouldn't recommend this to just any "noob" joining the game but for someone who knows hopup units and is a little more advanced in the inner workings of airsoft. Also match this with shimming your hopup arm,inner barrel,and a good bucking will bring great results

gives you better contact on the bb for improved bb flight
CNC made
not that expensive

Well its not really a con but you have to make sure you mod your hopup unit for AEG or Sniper as well make sure the hopup cut on your inner barrel is wide and deep enough for the nub to fit.
Search Tags: upgrade accuracy PolarStar

For Questions, Answers and Comments:

Talk about the (Discontinued) PolarStar Concave Hop Up Spacer with your friends on the facebook comments box below:
Copyright © 2021 Airsoft GI

All airsoft guns are required to have the tip (1/4 inch) of the barrel permanently colored in blaze orange. No person may openly display or expose any imitation firearm (replica firearm), in a public place. The term "public place" means an area open to the public or exposed to public view and includes streets, sidewalks, bridges, alleys, plazas, parks, driveways, parking lots, automobiles, whether moving or not, and buildings open to the general public, including those that serve food or drink, or provide entertainment, and the doorways and entrances to buildings or dwellings and the grounds enclosing them.

Any person who changes, alters, removes, or obliterates any coloration or markings that are required for by any applicable state or federal law or regulation, for any imitation firearm (replica firearm), or device in any way that makes the imitation firearm (replica firearm) or device look more like a firearm is guilty of violating the state or federal law.

By accessing the Site, you certify that you are older than 18 years of age or the age of majority where you live, whichever is older; that you are the owner of any credit card used to purchase on items on the Site; that you are familiar with all local laws in your area affecting your legal right to access airsoft products; that any products you buy are for your own private enjoyment and that you will NEVER share these products with a minor in ANY WAY.