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What is the difference between the 4' and 6' rail systems? — 1 Answer

by Mac, from GA, United States Asked on November 26, 2018

Name Kinetic Development Group Modular Receiver Extension, Compatible w/ all 7.62 & 5.56 SCAR Model (4.6)
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Answered by Mark H., Gear Expert, from IL, United States, on April 04, 2019

If you're referring to the 4.9 and 6.5, it''s the length of the accessory rail, and the number of slots - click on the photos and you should be able to see the difference - 6 slots vs 10 slots.

Mark H.

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Last updated 2025-11-12 UTC.