RAVEN barrel, 6.01mm, Beretta M9A1 GBB, 115mm, PDIPrecision steel 6.01 mm inner barrel PDI series of RAVEN for TM Beretta M9A1 (GBB) - length of 115 mm. Upgrade part is also applicable to some other gas pistols from Tokyo Marui with similar or shorter length inner barrel. Very accurate and hard steel barrel STKM13C. Steel barrel has undergone a specially made process, which also leads to specific dark color. For the precision surface coating material, which gives the final product corrosion resistance as well as very high hardness.
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Precision inner barrel is part of the upgrade, which together with the appropriate Hop-Up bucking significantly affects the accuracy and partially overall performance/range weapons. The smaller inner diameter, thus inevitably results to better tightening of BBs. At the same time, however, higher demands for regular cleaning and using only quality airsoft BBs (we recomend BBs from BLS). Otherwise, it may lead to a reduction of muzzle velocity as well as accidental or "suffocation," of the whole weapon. If you choose a barrel please do not make decision only according to the inner diameterand the lowest price. An important factor is also the procedure and method of production, the type of finishes, materials and the manufacturer and country where it was made.