Ismi's proprietary design features enhance the spring's ability to hold the pistol in battery longer when fired to maximize energy dispersion and reduce sight movement. All ismi springs are made from silicone chrome instead of 150 year old music wire. Every ismi spring is heat treated, shot peened & stress relieved to enhance durability, consistency and reliability. Ismi is a contractor of the u.s. Government and produces springs used in machine guns with incredibly high cycling rates. Also, the creator of ismi springs obtained his knowledge from extensive research in the development of springs used in indy car racing. A note from the manufacturer: maximum service temperature of ismi's material goes up to 700f. Music wire has a maximum service temperature of 250f and can be negatively affected at temperatures as low as 175f. This is important because temperatures approaching, or exceeding, the maximum service temperature are highly detrimental to spring life. Exposure to maximum service temperatures promotes additional spring set and is detrimental to the relaxation of the spring. In other words, the spring will not decompress as rapidly as it should. Available in 7, 8, 9, 10, 11, 12, 14, 16, 18, 20lbs.
Recoil Spring ISMI 1911 11 lb
The authorised South African distributor of this product is under no obligation to honour the manufacture's guarantees/warranties or to provide after-sales service.
Please note that this item is imported from the USA, and is designed to be used in the USA. In addition, if the unit is powered it will come with a US plug and an adapter/transformer may be required. Please click here for more information on power requirements, or check with us if you are unsure or need any assistance!
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Please also ensure that you are ordering the correct item for your particular application as returns to the USA are costly. Product reviews are also provided for most of our items, which can give you a good idea for possible things to look out for and the quality of the item. By clicking Add to Cart, you are confirming that the item is correct and you accept the conditions listed here.