The Sig Sauer Mainspring is a high-quality component designed for durability and performance featuring a sleek blue and stainless steel two-tone finish. Compatible with a range of Sig Sauer models including the P220 P226 P228 P229 and P245 this mainspring is engineered to enhance the reliability and function of your firearm ensuring smooth operation and consistent performance. Ideal for enthusiasts and professionals alike it represents the perfect blend of precision engineering and aesthetic appeal.