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  • JBU JA41 MIL4 Airsoft AEG M120 Tune Up Kit
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JBU JA41 MIL4 Airsoft AEG M120 Tune Up Kit

by JBU

List Price: $64.99
Price: $38.97 & FREE Shipping. Details
You Save: $26.02 (40%)
Only 1 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
  • Complete tune up kit for MIL4 Airsoft AEG's
  • Includes, JBU JA32 full teeth aluminum piston, JBU JA13 version 2 piston head and cylinder head set, JBU JA14 ported cylinder, JBU JA23 version 2 ball bearing spring guide, JBU JA26 steel M120 spring, JBU JA30 MIL4/MIL16 aluminum air nozzle
  • All components are available separately
  • Recommended for use in reinforced MIL4 gearboxes
  • Recommended for MIL4 barrel length Airsoft AEG's
4 new from $38.97


Product Description

Includes: M120 Spring, Reinforced Piston, Metal Spring Guide with Bearing, Aluminum Air Nozzle, 2 port Cylinder, Aluminum Cylinder Head and Piston Head.

Product Details

  • Product Dimensions: 2 x 1 x 1 inches
  • Shipping Weight: 0.8 ounces (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S.
  • ASIN: B002Y1B5NO
  • Item model number: SDJA41
  • Average Customer Review: 5.0 out of 5 stars  See all reviews (1 customer review)
  • Amazon Best Sellers Rank: #619,948 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
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Most Helpful Customer Reviews

By Sara on December 19, 2014
Verified Purchase
This is great the sealing is great the only problem was the cylinder wouldn't fit in my dboys gearbox shell perfecly so I filed and sanded the shell till it fit in. The air nozzle has a o-ring seal in it which saves a few fps from escaping. The spring is extremely strong a little hard to put in and get the gearbox put together. I have it in conjunction with high speed gears but the piston is heavy so it's a little slow but it's tough.
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