Check the listing for details. CZ 457 Series Rifles, COMPETITION Trigger Pull Reducer Spring 8oz+, ALL calibers. Color: Silver, Condition: New. Listed at 17.99 USD. For CZ 457 Series Rifles Trigger Reducing Spring down to 8 oz +. Condition is "New", MADE IN USA, FREE SHIPPING. • THIS SPRING IS FOR COMPETITION/BENCH REST USE ONLY ! • Reduce your trigger pull down to 8oz. Or less, Your results may vary.• Nearly a 80+% Trigger Pull Reduction!• Light spring rated @ 5.2 lbs/in• OEM spring rated @ 48 lbs/in (NOT included, for reference only)• Improved accuracy and overall rifle performance• Will work ONLY on CZ 457 series rifles. ALL CALIBERS• Installation should be performed by authorized gunsmith.• Made in the USA!• PayPal payment.• FREE shipping through USPS First Class With Tracking NumberNOT YOUR $0.55 STAMPED ENVELOPE. DISCLAIMER.This is a NO returnable item. As a buyer YOU are responsible to make sure the item you are acquiring matches the specific maker and model under the description. IF YOU ARE NOT QUALIFIED TO INSTALL THIS PARTS it is your responsibility to take it to the right knowledgeable person to install it. YOU are buying to use it at your own discretion and knowing the risks IF not installed properly.